æ ¹æ®åå¦å¼æ±ååä»·
ä¾æ®:ååç©ä¸æ£è´ååä»·ç代æ°å为é¶
æ¹æ³:(1)åå¦å¼å·²ç¥æ¶,è¦ç¡®å®å
¶ä¸æå
ç´ çååä»·.å¯ä¾æ®å¸¸è§å
ç´ çåå价表,ææ¯ä¾æ®å·²ç¥.
ä¾1:å·²ç¥æ°¢ä¸º+1ä»·,氧为-2ä»·,è¯ç¡®å®ç¡«é
¸(H2SO4)ä¸ç¡«å
ç´ çååä»·.
解:设硫é
¸ä¸ç¡«å
ç´ çåå价为x.
1Ã2 + x +(â2)Ã4 = 0
x=+6
ç:ç¡«é
¸ä¸ç¡«å
ç´ çåå价为+6.
ä¾2:å·²ç¥é为+2ä»·,è¯æ±Ca(OH)2æ¯æ°¢æ°§æ ¹çååä»·.
解:è®¾æ°¢æ°§æ ¹çåå价为x.
å 2 + 2x = 0
x =â1
ç:Ca(OH)2ä¸æ°¢æ°§æ ¹çåå价为â1.
ä¾3:å·²ç¥ç¢³é
¸æ ¹(CO3)çåå价为-2,è¯ç¡®å®ç¢³é
¸æ ¹ä¸ç¢³å
ç´ çååä»·.
解:å¨ååå¢ä¸æ£è´ååä»·ç代æ°åçäºååå¢çååä»·.设碳å
ç´ çåå价为x.
å x + (â2)Ã3 = â2
x = +4
ç:碳é
¸æ ¹ä¸ç¢³å
ç´ çåå价为+4.
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